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| author | Hao Xu <haoxu@linux.alibaba.com> | 2021-04-06 11:08:45 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-04-11 19:30:35 -0600 |
| commit | 417b5052be9ec892d06a45dbecf6d3f6ae211ae3 (patch) | |
| tree | 1679c9cb4f7a7aa3ed85930744a669ded134b6e0 /fs/io-wq.c | |
| parent | 53a3126756d6edfe4fd5fa9037cd949df94dfe55 (diff) | |
| download | linux-417b5052be9ec892d06a45dbecf6d3f6ae211ae3.tar.gz linux-417b5052be9ec892d06a45dbecf6d3f6ae211ae3.tar.xz | |
io-wq: simplify code in __io_worker_busy()
Leverage XOR to simplify the code in __io_worker_busy.
Signed-off-by: Hao Xu <haoxu@linux.alibaba.com>
Link: https://lore.kernel.org/r/1617678525-3129-1-git-send-email-haoxu@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io-wq.c')
| -rw-r--r-- | fs/io-wq.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c index 5551272cf553..b1c093de9723 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -329,6 +329,8 @@ static void __io_worker_busy(struct io_wqe *wqe, struct io_worker *worker, { bool worker_bound, work_bound; + BUILD_BUG_ON((IO_WQ_ACCT_UNBOUND ^ IO_WQ_ACCT_BOUND) != 1); + if (worker->flags & IO_WORKER_F_FREE) { worker->flags &= ~IO_WORKER_F_FREE; hlist_nulls_del_init_rcu(&worker->nulls_node); @@ -341,16 +343,11 @@ static void __io_worker_busy(struct io_wqe *wqe, struct io_worker *worker, worker_bound = (worker->flags & IO_WORKER_F_BOUND) != 0; work_bound = (work->flags & IO_WQ_WORK_UNBOUND) == 0; if (worker_bound != work_bound) { + int index = work_bound ? IO_WQ_ACCT_UNBOUND : IO_WQ_ACCT_BOUND; io_wqe_dec_running(worker); - if (work_bound) { - worker->flags |= IO_WORKER_F_BOUND; - wqe->acct[IO_WQ_ACCT_UNBOUND].nr_workers--; - wqe->acct[IO_WQ_ACCT_BOUND].nr_workers++; - } else { - worker->flags &= ~IO_WORKER_F_BOUND; - wqe->acct[IO_WQ_ACCT_UNBOUND].nr_workers++; - wqe->acct[IO_WQ_ACCT_BOUND].nr_workers--; - } + worker->flags ^= IO_WORKER_F_BOUND; + wqe->acct[index].nr_workers--; + wqe->acct[index ^ 1].nr_workers++; io_wqe_inc_running(worker); } } |